linux-stable.git/drivers/hwtracing, branch v4.3.3 Linux kernel stable tree coresight-etm4x: Support context-ID tracing when PID namespace is enabled 2015-08-05T20:30:15+00:00 Chunyan Zhang zhang.chunyan@linaro.org 2015-07-31T15:37:28+00:00 f67b467aab10685f695190d2f471221e7a314374 Like ETTv3, ETMv4 also needs the similar modifications to support Context ID tracing when PID namespace is enabled. Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Like ETTv3, ETMv4 also needs the similar modifications to support Context
ID tracing when PID namespace is enabled.

Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight-etm3x: Support context-ID tracing when PID namespace is enabled 2015-08-05T20:30:15+00:00 Chunyan Zhang zhang.chunyan@linaro.org 2015-07-31T15:37:27+00:00 a440617e0d882a35accdd32dd7ae180885c6b28c The Coresight ETM drivers already support context-ID tracing, but it won't work when PID namespace is enabled. This is because when using PID namespace a process id (ie. VPID) seen from the current namespace differs from the id (ie. PID) seen by kernel. So when users write the process id seen by themselves to ETM, there needs to be a translation from VPID to PID, as such ETM drivers will write the PID into the Context ID register correctly. Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
The Coresight ETM drivers already support context-ID tracing, but it won't
work when PID namespace is enabled. This is because when using PID
namespace a process id (ie. VPID) seen from the current namespace differs
from the id (ie. PID) seen by kernel.

So when users write the process id seen by themselves to ETM, there needs
to be a translation from VPID to PID, as such ETM drivers will write the
PID into the Context ID register correctly.

Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight-etm4x: Change the name of the ctxid_val to ctxid_pid 2015-08-05T20:30:15+00:00 Chunyan Zhang zhang.chunyan@linaro.org 2015-07-31T15:37:25+00:00 cd196ac3fa5a574f3ddf37b66fbe8c58225c3355 'ctxid_val' array was used to store the value of ETM context ID comparator which actually stores the process ID to be traced, so using 'ctxid_pid' as its name instead make it easier to understand. This patch also changes the ABI, it is normally not allowed, but fortunately it is a testing ABI and very new for now. Nevertheless, if you don't think it should be changed, we could always add an alias for userspace. Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
'ctxid_val' array was used to store the value of ETM context ID comparator
which actually stores the process ID to be traced, so using 'ctxid_pid' as
its name instead make it easier to understand.

This patch also changes the ABI, it is normally not allowed, but
fortunately it is a testing ABI and very new for now. Nevertheless,
if you don't think it should be changed, we could always add an alias
for userspace.

Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight-etm3x: Change the name of the ctxid_val to ctxid_pid 2015-08-05T20:30:15+00:00 Chunyan Zhang zhang.chunyan@linaro.org 2015-07-31T15:37:24+00:00 414a1417d7b35e0e72edb16e45840e242cb6b52e 'ctxid_val' array was used to store the value of ETM context ID comparator which actually stores the process ID to be traced, so using 'ctxid_pid' as its name instead make it easier to understand. This patch also changes the ABI, it is normally not allowed, but fortunately it is a testing ABI and very new for now. Nevertheless, if you don't think it should be changed, we could always add an alias for userspace. Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
'ctxid_val' array was used to store the value of ETM context ID comparator
which actually stores the process ID to be traced, so using 'ctxid_pid' as
its name instead make it easier to understand.

This patch also changes the ABI, it is normally not allowed, but
fortunately it is a testing ABI and very new for now. Nevertheless,
if you don't think it should be changed, we could always add an alias
for userspace.

Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight: replicator: Use builtin_platform_driver() 2015-08-05T20:30:15+00:00 Vaishali Thakkar vthakkar1994@gmail.com 2015-07-31T15:37:23+00:00 c35aaa13794a0c5b752af19993222d08497e7036 Macro builtin_platform_driver can be used for builtin drivers that don't do anything in driver init. This file depends on Kconfig CONFIG_CORESIGHT_LINKS_AND_SINKS which eventually depends on CORESIGHT. Both CONFIG_CORESIGHT_LINKS_AND_SINKS and CORESIGHT are bool. So, use builtin_platform_driver and remove some boilerplate code. Also, remove header file init.h as functionality like module_init and module_exit is now relocated to module.h. Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com> Suggested-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Macro builtin_platform_driver can be used for builtin drivers
that don't do anything in driver init. This file depends on
Kconfig CONFIG_CORESIGHT_LINKS_AND_SINKS which eventually
depends on CORESIGHT. Both CONFIG_CORESIGHT_LINKS_AND_SINKS and
CORESIGHT are bool. So, use builtin_platform_driver and remove
some boilerplate code.

Also, remove header file init.h as functionality like module_init
and module_exit is now relocated to module.h.

Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com>
Suggested-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight-etm3x: Add Qualcomm PTM v1.1 peripheral ID 2015-08-05T20:30:15+00:00 Ivan T. Ivanov ivan.ivanov@linaro.org 2015-07-31T15:37:22+00:00 27d3fd3d0d89030798121718637d6b0ed59e0ca5 Add Qualcomm's PTM v1.1 peripheral ID to supported devices. This device could be found at least in MSM8974 and APQ8064 chipsets. Signed-off-by: Ivan T. Ivanov <ivan.ivanov@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Add Qualcomm's PTM v1.1 peripheral ID to supported devices.
This device could be found at least in MSM8974 and APQ8064
chipsets.

Signed-off-by: Ivan T. Ivanov <ivan.ivanov@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/hwtracing: fix coresight-etm4x implicit <module.h> usage 2015-06-08T20:46:43+00:00 Paul Gortmaker paul.gortmaker@windriver.com 2015-06-04T00:03:56+00:00 fc368ea1ea00c9418d6f2c25cd4c0869f1a16d5f In commit 2e1cdfe184b5202d51e0611d7a051e2bea303946 ("coresight-etm4x: Adding CoreSight ETM4x driver") this driver was added. It uses module_amba_driver() to register itself with the system, which is just an alias for module_driver. This currently works by relying on getting that via init.h but we are planning to move that code[1] to module.h -- at which time this will fail to compile since it does not include module.h currently, resulting in: drivers/hwtracing/coresight/coresight-etm4x.c:2701:1: note: in expansion of macro ‘module_amba_driver’ module_amba_driver(etm4x_driver); ^ include/linux/device.h:1296:1: error: type defaults to ‘int’ in declaration of ‘module_init’ [-Werror=implicit-int] module_init(__driver##_init); \ ^ In the future, the amba support may want to create another alias that uses builtin_driver[2] for cases like this which are using bool Kconfig triggers, but for now we just fix the implicit include. [1] https://lkml.kernel.org/r/1433276168-21550-1-git-send-email-paul.gortmaker@windriver.com [2] https://lkml.kernel.org/r/1431287385-1526-1-git-send-email-paul.gortmaker@windriver.com Cc: Pratik Patel <pratikp@codeaurora.org> Cc: Kaixu Xia <xiakaixu@huawei.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
In commit 2e1cdfe184b5202d51e0611d7a051e2bea303946 ("coresight-etm4x:
Adding CoreSight ETM4x driver") this driver was added.

It uses module_amba_driver() to register itself with the system,
which is just an alias for module_driver.  This currently works by
relying on getting that via init.h but we are planning to move that
code[1] to module.h -- at which time this will fail to compile since
it does not include module.h currently, resulting in:

drivers/hwtracing/coresight/coresight-etm4x.c:2701:1: note: in expansion of macro ‘module_amba_driver’
 module_amba_driver(etm4x_driver);
 ^
include/linux/device.h:1296:1: error: type defaults to ‘int’ in declaration of ‘module_init’ [-Werror=implicit-int]
 module_init(__driver##_init); \
 ^

In the future, the amba support may want to create another alias that
uses builtin_driver[2] for cases like this which are using bool Kconfig
triggers, but for now we just fix the implicit include.

[1] https://lkml.kernel.org/r/1433276168-21550-1-git-send-email-paul.gortmaker@windriver.com
[2] https://lkml.kernel.org/r/1431287385-1526-1-git-send-email-paul.gortmaker@windriver.com

Cc: Pratik Patel <pratikp@codeaurora.org>
Cc: Kaixu Xia <xiakaixu@huawei.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/hwtracing: fix coresight-replicator-qcom implicit <module.h> usage 2015-06-08T20:46:43+00:00 Paul Gortmaker paul.gortmaker@windriver.com 2015-06-03T20:52:57+00:00 5a6a7cd05c039f3c4d8f5f52fddfb7cb2bbd6119 In commit 620cf787c121f39b5223e43bad3d1b7c66ecead5 ("coresight: replicator: Add Qualcomm CoreSight Replicator driver") this driver was added. It uses module_amba_driver(replicator_driver) to register itself with the system -- which is just an alias for module_driver. This currently works by relying on getting that via init.h but we are planning to move that code[1] to module.h -- at which time this will fail to compile since it does not include module.h currently, resulting in: drivers/hwtracing/coresight/coresight-replicator-qcom.c:214:1: error: type defaults to 'int' in declaration of 'module_init' [-Werror=implicit-int] drivers/hwtracing/coresight/coresight-replicator-qcom.c:214:1: error: type defaults to 'int' in declaration of 'module_exit' [-Werror=implicit-int] In the future, the amba support may want to create another alias that uses builtin_driver[2] for cases like this which are using bool Kconfig triggers, but for now we just fix the implicit include. [1] https://lkml.kernel.org/r/1433276168-21550-1-git-send-email-paul.gortmaker@windriver.com [2] https://lkml.kernel.org/r/1431287385-1526-1-git-send-email-paul.gortmaker@windriver.com Cc: Pratik Patel <pratikp@codeaurora.org> Cc: Ivan T. Ivanov <ivan.ivanov@linaro.org> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
In commit 620cf787c121f39b5223e43bad3d1b7c66ecead5 ("coresight: replicator:
Add Qualcomm CoreSight Replicator driver") this driver was added.

It uses module_amba_driver(replicator_driver) to register itself with
the system -- which is just an alias for module_driver.  This currently
works by relying on getting that via init.h but we are planning to move
that code[1] to module.h -- at which time this will fail to compile since
it does not include module.h currently, resulting in:

drivers/hwtracing/coresight/coresight-replicator-qcom.c:214:1: error: type defaults to 'int' in declaration of 'module_init' [-Werror=implicit-int]
drivers/hwtracing/coresight/coresight-replicator-qcom.c:214:1: error: type defaults to 'int' in declaration of 'module_exit' [-Werror=implicit-int]

In the future, the amba support may want to create another alias that
uses builtin_driver[2] for cases like this which are using bool Kconfig
triggers, but for now we just fix the implicit include.

[1] https://lkml.kernel.org/r/1433276168-21550-1-git-send-email-paul.gortmaker@windriver.com
[2] https://lkml.kernel.org/r/1431287385-1526-1-git-send-email-paul.gortmaker@windriver.com

Cc: Pratik Patel <pratikp@codeaurora.org>
Cc: Ivan T. Ivanov <ivan.ivanov@linaro.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight: replicator: Add Qualcomm CoreSight Replicator driver 2015-05-24T18:12:08+00:00 Pratik Patel pratikp@codeaurora.org 2015-05-19T16:55:21+00:00 620cf787c121f39b5223e43bad3d1b7c66ecead5 This driver manages Qualcomm CoreSight Replicator device, which resides on the AMBA bus. Replicator has been made programmable to allow software to turn of the replicator branch to sink that is not being used. This avoids trace traffic to the unused/non-current sink from causing back pressure that results in overflows at the source. Signed-off-by: Pratik Patel <pratikp@codeaurora.org> Signed-off-by: Ivan T. Ivanov <ivan.ivanov@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
This driver manages Qualcomm CoreSight Replicator device, which
resides on the AMBA bus. Replicator has been made programmable to
allow software to turn of the replicator branch to sink that is not
being used. This avoids trace traffic to the unused/non-current sink
from causing back pressure that results in overflows at the source.

Signed-off-by: Pratik Patel <pratikp@codeaurora.org>
Signed-off-by: Ivan T. Ivanov <ivan.ivanov@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight: fix typo in of_coresight.c 2015-05-24T18:12:08+00:00 Pankaj Dubey pankaj.dubey@samsung.com 2015-05-19T16:55:20+00:00 437012368c9fdd2e631f851f349d36bdd0873166 fixes obvious typo in of_coresight.c %s/non-configuable/non-configurable Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
fixes obvious typo in of_coresight.c
%s/non-configuable/non-configurable

Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>